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after_orgasm bdsm bird_dog blue_hair bodily_fluids bondage bound canid canine canis crying cum_collecting domestic_dog ejaculation english_text golden_retriever grey_body hair hands_behind_back hunting_dog laboratory machine male mammal milking_machine penile penis_milking penis_milking_machine restrained restraints retriever scientific_instrument submissive submissive_male tears text zoul zoul_illustration